Bleeding DGA monitor - OPT100

OPT100 User Guide

Document code
Document type
User guide
  • Cabinet key
  • 5-mm Allen key

The DGA monitor can accumulate excess gases in the measurement system. This can happen, for example, because of an air leak in the oil lines. The DGA monitor detects excess gases and enables device alert code 2300, Excess gas in the system.

To restore normal operation, perform the procedure below to bleed the excess gas, and restart measurement after successfully bleeding the system. You must be on site with access to the DGA monitor cabinet, as you have to remove and reattach the bleed plug as instructed.

CAUTION Do not use this procedure for bleeding oil lines. This procedure only works for excess gas inside the DGA monitor. Using this procedure for oil lines may push the air into the transformer and damage it. If the oil lines need bleeding, use forced uninstallation and then perform installation as instructed in OPT100 Installation Guide (M211857EN).
  1. Connect to the DGA monitor user interface and log in as an Admin user.
  2. Select Service to open the Service tools page, and locate the Bleeding tool.
  3. Select Bleed > Start to start the bleeding sequence.

    The user interface will change to show the bleeding stages and approximate times between the stages.

  4. Follow the progress and instructions on screen. While waiting, open the door of the DGA monitor cabinet and locate the bleed plug.
  5. When instructed to do so, remove the bleed plug from the bleed valve. Select Continue when done.
  6. When instructed to do so, reattach the bleed plug to the bleed valve. Select Continue when done.
  7. When the bleeding sequence is completed, select Continue to exit the tool.
  8. Close and lock the door of the DGA monitor cabinet.
    Even if the bleeding tool does not complete successfully, you must reattach the bleed plug in any case before closing the door of the cabinet.